diff --git a/src/benchmarks/micro/libraries/System.Runtime/Perf.String.cs b/src/benchmarks/micro/libraries/System.Runtime/Perf.String.cs
index 4622f970fd7..357052a8d39 100644
--- a/src/benchmarks/micro/libraries/System.Runtime/Perf.String.cs
+++ b/src/benchmarks/micro/libraries/System.Runtime/Perf.String.cs
@@ -321,6 +321,7 @@ public static string[] ReadInputFile(string name)
             => File.ReadAllLines(Path.Combine(AppContext.BaseDirectory, "libraries", "System.Runtime", "TestData", name));
 
         [Benchmark]
+        [BenchmarkCategory(Categories.NoWASM)] // CSV files in TestData are not available in WASM filesystem
         [ArgumentsSource(nameof(CsvCorpus))]
         public string[] Split_Csv(string testName, string[] lines)
         {